As someone who just transferred from the german realms for roleplay, I have to say I have never seen so many active roleplayers in an evening.
Aldor (german) at best has maybe like 50 players in Stormwind on some good days. Meanwhile Argent Dawn comes round up to 100+ in Stormwind alone.
That is pretty impressive. It is just sad that roleplay on german realms is dying out with time and the more sadly part is that roleplaying has a big stigma in german gaming culture.